
Find Your Perfect Fit with Confidence
Choosing the right ring size is key to enjoying your jewellery comfortably every day, especially for engagement rings, wedding rings, or any precious piece from Astella Jewellery Birmingham. We understand that finding the perfect fit can feel tricky, so this guide will help you measure your ring size easily and accurately.
How to Measure Your Ring Size at Home

Method 1: Use a Ring That Fits
- Find a ring that fits the finger you want to measure.
- Measure the inner diameter of that ring in millimeters (mm) using a ruler or caliper.
- Match that measurement to our Astella Ring Size Chart below.

Method 2: Measure Your Finger
- Wrap a thin strip of paper or a piece of string around your finger where the ring will sit.
- Mark where the ends meet, then measure the length in millimeters.
- Use the measurement to find your size on the chart.

Tips for Accurate Measurement:
- Measure your finger at the end of the day when it’s largest.
- Avoid measuring when your fingers are cold or swollen.
- If you’re between sizes, it’s usually better to go slightly larger.
Astella Ring Size Chart (UK Sizes)
UK Size | Diameter (mm) | Circumference (mm) |
---|---|---|
J | 15.7 | 49.3 |
K | 16.1 | 50.6 |
L | 16.5 | 51.9 |
M | 16.9 | 53.1 |
N | 17.3 | 54.4 |
O | 17.7 | 55.7 |
P | 18.1 | 57.0 |
Q | 18.5 | 58.3 |
R | 18.9 | 59.5 |
S | 19.3 | 60.8 |

Unsure About Your Size? We’ve Got You Covered
At Astella Jewellery, we want you to love your ring, and wear it comfortably for life. If you’re not completely sure about your size, don’t worry! We offer free ring resizing on all engagement and wedding rings purchased from us.
Our expert jewellers will ensure your ring fits perfectly, whether you need it made a little smaller or larger. Just get in touch with our customer service team or visit our Jewellery Quarter Birmingham showroom to arrange your resizing.